Have you ever been to a youth camp or youth retreat and just didn’t want it to end? The spirit of the camp was so alive and there was good Bible teaching and excellent worship music. You surrounded by good Christian friends and fellowship. You just didn’t want to go back home because you knew that when you returned you were going to be in a completely different environment. You’d be in an environment where you were surrounded with people who couldn’t care less about Jesus or the your commitment to follow him. In fact, they would do their best to discourage you.
God allows the righteous and the wicked to coexist in this age. But eventually he will eventually separate the wicked, judge them and punish them, while gathering the righteous together to be rewarded by enjoying his presence forever.